Deliverable 5.2 - the School of Engineering and Design - Brunel ...

ICT Project 3D VIVANT– Deliverable 5.2Contract no.:248420Search & Retrieval Mechanisms &Toolsname under the “descr” folder. Moreover, under each descriptor folder there are two subfolders (seeFigure 6): one for the extracted features (“features” folder) and one for the bag-of-words vector(“words” folder) that will be generated for each feature file, using a generated codebook (see section3.3).The Search and Retrieval Framework supports the following descriptor extraction algorithms for theextraction of local features of the multimedia objects:1. CSIFT: Colour SIFT2. OSIFT: Opponent SIFT. A Colour SIFT variant where a different colour model is used.3. GB: Geometric Blur4. SSIM: Self Similarity5. PI: Projection Images. Applicable only in depth dataThe User Interface for extracting descriptors (see Figure 7) enables the user to select whether thesystem will generate descriptors for one descriptor algorithm or for all of them. Based on the selectionof the user, the system triggers one or multiple threads that extract descriptors for the same raw data(under “data” directory) in parallel. From this step until the finish of the final descriptors the systemworks without the need for user intervention. The extraction of the local descriptors is a lengthyprocess and thus a progress bar informs the user for the progress of the computations (Figure 8).Moreover, the console window prints log messages to give more information on the runningprocesses.Figure 7: Descriptors Extraction User Interface4/03/2013 14